Regenerative brake control system of electric vehicle

摘要

A regenerative brake control system of an electric motorcycle comprises an electric motor, sensors for detecting vehicle states of the electric motorcycle, and a control unit which sets target regenerative torque based on the vehicle states, when a regeneration condition is satisfied, and performs asymptotic control in such a manner that a torque command provided to the electric motor gets gradually close to the target regenerative torque with a passage of time.

主权项

1. A regenerative brake control system comprising:
an electric motor; a detecting device for detecting a vehicle state; and a control unit configured to set a regenerative torque of the electric motor; wherein the control unit is configured to set a target regenerative torque based on the vehicle state detected by the detecting device when a predetermined regeneration condition is satisfied, wherein when a predetermined asymptotic control condition is satisfied, the control unit is configured to perform an asymptotic control process in which a regenerative torque command provided to the electric motor approaches the target regenerative torque over time, and wherein when the predetermined asymptotic control condition is not satisfied, the control unit is configured to immediately provide the target regenerative torque as the regenerative torque command to the electric motor; wherein the target regenerative torque is a negative torque value, and wherein the control unit is configured to:
calculate an asymptotic control amount in the asymptotic control process, the asymptotic control amount being a positive torque value that is smaller than an output torque of the electric motor just before the regeneration condition is met,decrease the positive torque value of the asymptotic control amount over time, andcalculate the regenerative torque command by adding the asymptotic control amount to the target regenerative torque.